... 5mmPerformance: High capability of anti-abrasion, anti-corrosion, anti-impact, self-lubrication, it has excellent capability of anti-abrasion, self-lubrication and ... best in erasure effect.The most chemical stability, it is anti-corrosion of any corrupt medium and organic medium ... in certain temperature and thickness scope.It has excellent anti-adhesive, it is junior to PTFE only.Absolutely safe ...